I opened the hood on an 89 F350 at a junk yard a year or so ago and it had a hydraboost, so it can be done.
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1997 F250 Crew Cab 4x4
1988 F350 7.3 Crew Cab 4x4 Dually C6 w/ GearVendors Overdrive currently in a deep sleep until motor overhaul is finished. 1984 F250 2 wheel drive 6.9 Extended cab 4 spd manual. (3) 1976 F250 Reg Cab 4x4 All 390, two C6 and one 4 spd.
I am running hydraboost on my 86 F250, direct bolt on install.
I am using the hydraboost unit off a 97 F450 with my 86 master cylinder and a 97 power steering pump with the 86 pulley on it.
Real brakes.
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86 F250 HD 6.9 IDI ATS turbo "not exactly" stock 4x4 T19 BW1345 3.55LS both ends D60 front, 10.25" Sterling rear, ram air, dual stacks.
Sorry 'bout the delay replying. Had to go out of town this weekend to rescure the wife's Grand Marquis.....then had to replace the cracked intake manifold.
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Scott - FTE moderator
01 F-250 Lariat, 7.3, ZF-6, NV271, -38R, SII splits, DI tunes, Custom fuel, IDM140....and more little mods than I can remember.